ROUGH EDGES: Royal officials have ordered courtiers to train Cressida Bonas in how to be a royal [GETTY]

She has had intensive sessions in handling the media and how to behave in public.

Cressida, 25, is also being drilled in security by top royal advisers.

The crash course comes as Palace insiders tip the soldier Prince to propose before his 30th birthday in September.

Now courtiers have acted to “smooth down her rough edges”.

A source said: “The Palace put plans in place as soon as Harry started his Army desk job in London. It was seen as a sure sign things were quickly becoming serious between him and Cressida. Harry now has a new team around him and their role is to advise the couple together.

“Cressida’s mum has been tutoring her since she was little, so now the training is going up a level. You could call it princess boot camp.”

Cressida is the daughter of socialite Lady Mary-Gaye Curzon and moves in some of Britain’s poshest circles.

But the former dancer is known for being a free spirit and famously first got together with Harry at a music festival.

It is these “Bohemian” tendencies the Palace are keen Cressida leaves behind as she is compared unfavourably to Princess Kate, 31.

One source said: “The Palace was appalled to see her plaiting her hair in public when she went to support Harry at Wembley.